Infineon Technologies CY7C11481KV18-400BZXC

Overview

CY7C11481KV18 from Cypress Semiconductor is a 18-Mbit synchronous pipelined SRAM with DDR II+ architecture, configured as 1M × 18-bit, operating at 400 MHz with 2.0-cycle read latency and 1.8V core / 1.4–1.8V I/O supply. It delivers 900 Mbps data throughput via double-data-rate interface and supports echo clocks (CQ/CQ) and QVLD for precise high-speed data capture in networking and packet buffering systems.

For engineers reviewing the CY7C11481KV18 datasheet, CY7C11481KV18 pinout, CY7C11481KV18 application, or CY7C11481KV18 equivalent, this device is selected for high-bandwidth burst-access memory subsystems requiring deterministic timing, JTAG-testable DDR SRAMs with HSTL I/O, and stable 1.8V core operation in telecom line cards and FPGA co-processor buffers.

Technical Context

This SRAM implements a synchronous pipelined architecture with dual input clocks (K/K) driving address latching, write data registration, and read data output on rising edges only. Its DDR II+ mode enables 2-word burst transfers per address cycle, reducing address bus frequency while maintaining full bandwidth.

The device integrates a PLL for accurate data placement, echo clocks (CQ/CQ) aligned to output data edges, and a QVLD signal indicating valid data windows. It supports programmable impedance via ZQ and operates with DOFF pin controlling read latency mode (2.0 cycles HIGH, 1.0 cycle LOW).

Key Specifications

Pinout & Package

Package: 165-ball Fine-Pitch Ball Grid Array (FBGA), 13 mm × 15 mm × 1.4 mm body, 0.8 mm ball pitch, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed synchronous SRAM applications.

Compared with CY7C11481KV18, CY7C11501KV18 offers higher data width but lower density, while AS7C3256A-15JCIN lacks DDR timing, echo clocks, and QVLD - making it incompatible with high-speed burst-oriented designs requiring sub-ns timing control.

Availability

CY7C11481KV18 is available at Aetrix Electronics and suitable for telecom infrastructure, FPGA-based embedded accelerators, and high-speed test instrumentation requiring stable component supply, long-lifecycle support, and traceable sourcing.

Supply support for CY7C11481KV18 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Cypress Semiconductor (now part of Infineon Technologies) designs high-performance memory and programmable solutions for communications, industrial, and automotive markets.

CY7C11481KV18 belongs to the DDR II+ SRAM product line, engineered specifically for deterministic, high-bandwidth buffering in packet-processing and FPGA-adjacent memory subsystems.

FAQ

What is the function of the DOFF pin on CY7C11481KV18?

The DOFF (Data-Off) pin selects read latency mode: when asserted HIGH, the device operates with 2.0-cycle read latency (DDR II+ mode); when LOW, it reverts to 1.0-cycle latency (DDR I–compatible mode). This allows system designers to trade off latency for timing margin or legacy compatibility without changing hardware layout.

Can CY7C11481KV18 operate with VDDQ = 1.5 V?

Yes - the device supports VDDQ from 1.4 V to 1.8 V, including 1.5 V. At 1.5 V, it meets HSTL Class I specifications with adjusted drive strength and AC timing parameters as defined in the datasheet's DC/AC Electrical Characteristics tables. No configuration register setting is required.

How does the QVLD signal improve system timing margin?

QVLD pulses HIGH only during valid DQ[17:0] windows, synchronized precisely to data edges. This eliminates reliance on fixed clock-to-output delays and allows receivers to gate sampling logic dynamically - improving setup/hold margin by up to 180 ps across voltage and temperature variations.

Is the 165-ball FBGA package lead-free?

Yes - CY7C11481KV18 is offered in both Pb-free (RoHS-compliant) and non-Pb-free versions. The "ZXC" suffix in the part number indicates the Pb-free, halogen-free, and green-compliant variant with NiPdAu finish and standard reflow profile compatibility.